EP1064779B1 - Leseeinheit für ein dokument - Google Patents
Leseeinheit für ein dokument Download PDFInfo
- Publication number
- EP1064779B1 EP1064779B1 EP99908665A EP99908665A EP1064779B1 EP 1064779 B1 EP1064779 B1 EP 1064779B1 EP 99908665 A EP99908665 A EP 99908665A EP 99908665 A EP99908665 A EP 99908665A EP 1064779 B1 EP1064779 B1 EP 1064779B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- reading unit
- document
- scanner
- control
- opto
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/40—Picture signal circuits
- H04N1/407—Control or modification of tonal gradation or of extreme levels, e.g. background level
- H04N1/4076—Control or modification of tonal gradation or of extreme levels, e.g. background level dependent on references outside the picture
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/40—Picture signal circuits
- H04N1/401—Compensating positionally unequal response of the pick-up or reproducing head
Definitions
- the invention relates to a reading unit for a document, with a control and / or Evaluation device and with a scanner device for reading the document, with a guide device for the document and with a transport device for the relative adjustment between document and scanner device, the Control and / or evaluation device a compensation device with correction values for the correction of an optoelectric converter of the scanner device has outgoing image signals in real time and that for the optoelectronic converter in each case individual correction values at least by comparing nominal values of a Reference document with the actual values given by the optoelectric converter the image signals of the reference document are determined and in a first storage device are permanently stored.
- WO 97/02698 A1 describes an optoelectronic reading unit or a scanner for documents, comprising an arrangement of several optoelectronic sensors and several light sources in the form of light-emitting diodes. These components form an optoelectronic image capture device, which works with the scanner electronics is connected to coordinate the optical scanning process.
- the corresponding scanner electronics also include a correction circuit, with which is the image signals provided by the optoelectronic scanner can be corrected or adjusted.
- the correction data used for this are stored in a storage device of the scanner electronics and are readable from the component making the corrections. With an exchange the optoelectronic scanning device, it can happen that the memory with the correction or adjustment data is not replaced or updated and thus incorrect correction data are used. In such a case the captured image data are continuously falsified even more.
- EP 0 689 341 A2 there is also a scanner with a correction function for the detected Image data described.
- This correction circuit also includes a storage device, particularly not one volatile memory in the form of a so-called EEPROM in which the corresponding Correction values for comparing the respective image data are stored.
- This storage device for the correction data is part of the scanner electronics and is used for matching the image signals from the correction circuit, in particular from a microprocessor directly to the correspondingly connected storage device accessed with the correction data. This one too Design, it can happen that correction data is used, which are not matched to the respective optoelectronic scanning device are.
- US 4,491,961 A also describes a correction circuit for the scanning signals an optoelectronic scanning device.
- the optoelectronic Scanning device captured image data in digital form to a Correction circuit forwarded, which according to the predefined correction values changes the image data received by the scanner head.
- the storage devices with the correction or adjustment data are assigned directly to the correction or compensation circuit.
- the installed optoelectronic Unsuitable correction data are used for the scanning device.
- the present invention has for its object to provide a reading unit that works fault-free and therefore has a high performance.
- an embodiment according to claim 2 is advantageous, since it makes computing and thus time-consuming corrective measures are unnecessary.
- An embodiment according to one or more of claims 3 to 5 is also advantageous, because it achieves an extremely interference-free and functionally stable construction.
- a further advantage is a training according to claim 11, because it is fixed or always constant processes in the reading unit and comparatively time-consuming, of the Decision-making tasks or comparison operations dependent on system states are divided short lead times are achieved.
- the particular one purely hardware-based flow control device in particular in the form of a "state machine” trained, takes over the constant processes and the system-related processes are controlled by at least one microprocessor or determined.
- a training according to one or more of claims 12 to is also advantageous 14, because this makes universally applicable and widespread communication interfaces are used, which have a high reliability.
- a robust scanner device is achieved by the configuration according to claim 17, which enables easy handling and high-precision Adjustment work on the scanner head cannot be impaired.
- an embodiment according to claim 18 is also advantageous, since it reflects light or shadows caused by a rough paper surface can be avoided.
- a further advantage is a training according to claim 33, as this means that at the same time The amount of information to be recorded can be reduced.
- a further development according to claim 34 and / or 35 is also advantageous since it does so information relevant for the owner of the documents or for the operator of the reading unit can be permanently attached to the processed document.
- This Information is preferably applied in plain text and can be used as evidence serve the processing or as confirmation of the selection made.
- an embodiment according to claim 36 is also advantageous since Reading unit, in particular can be operated by general users. Independently of which the reading unit can also be accessible to the public or the public Operable devices are used and is extremely easy to use with high functional and interference immunity.
- FIG. 1 shows a greatly simplified block diagram of an inventive or a reading unit 1 designed with components according to the invention for detection optical images or signs on documents 2 and for conversion thereof into electrical signals for further electronic processing of the captured image data.
- document 2 here are documents 3, in particular payment slips from banking and betting slips or lottery tickets and other receipts Documents with characters and other signs and markings on individual Understand sheets of paper.
- a receipt 3, in particular a payment slip or betting slip, which is suitable for a corresponding electronic processing of the data or information contained on document 3 is provided by any user via a feed opening 4, the Cross-sectional dimensions essentially the cross-sectional dimensions of what is to be imported Document 3 correspond to the optoelectric reading unit 1 are supplied.
- the feed opening 4 is preferably in a housing part 5 of a bank or Lottery terminals provided. The one from the respective operator via the feed opening 4 manually fed document 3 is based on the direction of insertion following the Feed opening 4 and also within the entire, closed to the outside and reading unit 1 protected against access via a guiding device 6 on the latter entire transport route within the reading unit 1.
- the guide device 6 can have guide strips and deflection rollers or pressure rollers for document 3, which essentially include the transport route and determine the transport direction of document 2.
- the detection device 8 Relative to a feed direction - arrow 7 - after the feed opening 4 is at least a detection device 8 for detecting plugged into the feed opening 4 Objects arranged.
- the detection device 8 is preferably by at least one Infrared light barrier 9 formed, which is the intended supply of one to be processed Document 3 reliably recorded in paper form. If necessary, the detection device 8 also by mechanical switching elements or also by capacitive detection elements, in which the document 3 is the dielectric of a capacitor plate arrangement represents or causes a change of the same, be formed.
- the locking and unlocking device 10 is directly or indirectly from the detection device 8 controlled and gives depending on the detection result of Detection device 8 the guide device 6 free or blocked the locking and Release device 10 the guide device 6 to prevent the intrusion of the prohibited Prevent object in the reading unit 1.
- the detection device 8 is in particular for detecting supplied objects trained, with only when reliable detection of objects made of paper with typical characteristic values of the locking and unlocking device 10, in particular the shutter 11, for unimpeded, further feeding of document 2 is released.
- the Detection device 8, preferably designed as an infrared light barrier 9, delivers especially depending on the transmitted light intensity, i.e. depending on the through the document 3 on its second flat side transmitted light intensity a corresponding Signal or already the release or lock signal for the shutter 11. This prevents that unsuitable foreign objects that may result from vandalistic actions originate and e.g. are formed by metallic objects or plates in which Inside the reading unit 1 can get damaged and thereby medium-term failure of the reading unit 1 is avoided.
- the locking and unlocking device 10 is preferably by a rotationally symmetrical Shaft 12 formed with a preferably circular cross section, the at least one has slot-shaped opening 13, the cross-sectional dimensions at least correspond to the cross-sectional dimensions of document 3.
- the shaft 12 extends across the guide device 6 or across the Guideway for document 3 and is one across the conveying or feeding direction - Arrow 7 - the document 3 extending axis 14 rotatably mounted.
- a drive device 15, in particular an electric motor 16, is assigned to shaft 12, which sets the shaft 12 in rotary motion when electrically acted upon.
- the drive device 15 can be controlled such that the opening 13 with the guide device 6 is aligned and so the guideway for the document 3 essentially continuously continues.
- the locking and unlocking device 10 of the drive device 15 in angular positions in which the breakthrough 13 extends at an angle to the level of the guide device 6 and therefore the guide device 6 for document 3 interrupts or blocks, so that insertion the document 3 in the conveying or feeding direction 7 - arrow 7 - via the locking and release device 10 is prevented.
- translating locking and release devices 10 such as to provide plate-like sliders or locking pins, which the guide device 6 lock or unlock.
- the locking and release device 10 is in the release position offset and the operator can insert the document 3 deeper into the reading unit 1.
- This transport device 17 for the electric motor transport of the document 3 within the reading unit 1 can drive and / or transport rollers 18, 19 or rollers as well as pressure, guide and / or counter pressure rollers or rollers include.
- the transport device 17 conveyor belts or conveyor belts, which ensure smooth transport of the receipt 3 possibly also over several deflections within the reading unit 1 to guarantee.
- the drive rollers 18 and / or the transport rollers 19 preferably have of the transport device 17 at least on the surface areas contacting the document 3 a high coefficient of friction with respect to paper Document 3, so that a good frictional connection between the jacket areas the drive or transport rollers 18, 19 and the document 3 is given.
- the drive and / or transport rollers 18, 19 can increase the frictional connection with the document 3 to be transported in the jacket area with well adhering to paper Layers such as Rubber or plastic layers can be provided to relatively high Driving forces can be transferred to document 3.
- the drive rollers 18 of the transport device 17 are standing with at least one drive device 20, in particular with at least one Electric motor 21 in rotary connection.
- the transmission of the rotary movement from the drive device 20 on the drive rollers 18 can also be interposed of conversion devices 22, in particular gear units 23.
- the Transfer devices 22 can e.g. through gear drives, through friction wheel drives and / or be formed by belt drives and take over at the same time Implementation of the speed of the drive rollers 18, so that a corresponding transport speed of document 3 is achieved.
- a longitudinal extension of the document 3 is related to the feed direction - arrow 7 larger than a distance 24 also related to the feed direction - arrow 7 between the outside of the feed opening 4 and a bottom or top dead center on the outer surface of the first drive or transport roller 18, 19.
- the document 3 is now completely from the transport device 17 into the reading unit 1 moved in.
- the document 3 is subsequently depending on the transport device 17 and in Dependence of the electrical loading of the drive device 15 on a Scanner device 25 moves the reading unit 1.
- a Scanner device 25 moves the reading unit 1.
- the detection device 26 is for detecting the document 3 transported by the transport device 17. Once the receipt 3 is recognized by the detection device 26, the scanner device 25 activated. The detection device 26 thus serves to activate the scanner device 25 in the event of a document 3 to be recorded approaching the Scanner area.
- the detection devices 8, 26 by light emitting and receiving units are preferred with these assigned optical prisms for light deflection educated.
- the light emitting and receiving units are together one of the assigned to both flat sides of the document 3, whereas the optical prism for Light beam deflection is assigned to the other flat side of the document 3, so that the Light emitting and light receiving point assigned to one of the two sides of the document 3 are.
- the scanner device 25 comprises a contact scanner 28, which on the receipt 3 included images, such as characters and graphic characters, like crosses, detected and converted into corresponding electrical signals.
- the contact scanner 28 has at least one translucent or transparent surface area 29 on which a lower or upper contact surface 30 for the at Scanner device 25 forms led document 3.
- the drive and / or transport rollers 18, 19 of the transport device 17 press the document 3 against it in this way the contact surface 30 that this over its entire surface area with the contact surface 30 is contacted.
- the drive or transport rollers 18, 19 form in the scanner area thus a pressing device 31, which covers the entire surface of the document 3 against the contact surface 30 presses and thus wave formations of the document 3 over the scanner area prevented, or any deformation of the document 3 paves.
- the transparent one Surface area 29 of scanner device 25 can be, for example, a translucent one or transparent body, such as a plate made of glass or Plastic.
- the scanner device 25 comprises a plurality of light sources 32, 33, which optically illuminate document 3 to be scanned.
- the light sources 32, 33 are preferably through Light-emitting diodes (LED) are formed, but can also be produced by homogeneously illuminating gas discharge lamps or in some cases also be formed by incandescent lamps.
- LED Light-emitting diodes
- the light sources 32, 33 are preferably the information or characters to be scanned assigned flat side of the document 3 assigned and at least radiate their light towards this flat side of document 3. In particular, that of the contact surface 30 facing flat side of the document 3 with that of the light sources 32, 33 emitted light illuminated.
- the scanner device 25 or the contact scanner 28 comprises an optoelectric Converter 34, which consists of a plurality of optoelectric elements, the convert the light arriving on their surface into corresponding electrical signals.
- the optoelectric converter 34 consists of a large number of lines or matrix-like arranged optoelectric elements, their size or whose distance from one another determines the level of the graphic resolution of the scanning zone.
- the optoelectric converter 34 detects at least a portion of the cross Direction of transport of the document 3 extending extent. That is, the variety optoelectric transducers 34 having optoelectric elements extends at least over a portion of the flat side of the document 3, so that in the respective Area of document 3 contained information or data saved in a non-contact Way can be scanned.
- the optoelectric converter 34 is preferably by a CCD element (charge coupled device), in which the individual optoelectronic elements at least are arranged in a row.
- CCD element charge coupled device
- the document 3 and the scanner device 25 or the contact scanner 28 is also the Entire extension of the document 3 running parallel to the transport direction can be scanned. Due to the direction of the optoelectric extending transversely to the transport direction Transducer 34 and by the relative movement between the document 3 and the scanner device 25 are therefore certain surface areas, which are at least a partial area make up a flat side of the document 3, can be scanned.
- the optoelectric converter 34 changes the prevailing light conditions on each optoelectric element, for example by the light intensity, by the light intensity and / or by the color of the light or the like are defined in corresponding, the respective Electrical signals representing light conditions.
- the light emitted by the light sources 32, 33 can be white light or be formed by light of any color.
- the light sources preferably radiate 32, 33 but colored light to match the color of the emitted light Hide or not color areas or color representations on document 3 mitzuscannen.
- the light sources 32, 33 preferably emit red light in order to red Characters or red graphics or illustrations on document 3, such as not to be scanned or hidden on a payment slip and thereby the to reduce information to be recorded or the resulting amount of data.
- the light of corresponding color emitted by the light sources 32, 33 dazzles So pictures or characters on the document 3, which are the same or similar Show off color.
- red light sources 32, 33 all areas of document 3 are hidden with red or yellow color, or are with such color applied representations on the document 3 not scanned.
- light sources 32, 33 for the emission of different wavelengths from Light, for example intended to emit red, green or blue light, to use the red, green or blue light color to print the respective color Hide images on slip 3.
- the light refracted in the scanner area is preferably via an optical lens arrangement 35 imaged on the optoelectric converter 34.
- the lens assembly 35 includes at least one gradient lens 36 or imaging lens that refracts the Images light on the optoelectric converter 34 or on the CCD element.
- Document 3 is approximately in the area with a resolution scanned between 200 dpi to 400 dpi (dots per inch) and at least 256 gray levels. Of course it is also possible to have higher resolutions and / or finer to realize graded evaluations or color detections.
- the document 3 to be scanned optically becomes two-sided by the light sources 32, 33 illuminated to reflect light caused by a rough paper surface can avoid.
- the light sources 32, 33 are related to the conveying direction of the document 3 relative to the scanner device 25 before and after the opto-electrical Transducer 34 arranged so that the opto-electrical transducer 34 based on the Transport direction of the document 3 between at least two light sources 32, 33 arranged is, or is partially bordered by at least two light sources 32, 33. Consequently are shadows or reflections of light that falsify the optical would cause scanning, largely excluded.
- An electrical image signal 37 emitted by the optoelectric converter 34 which the represents light states acting on the optoelectric converter 34 or the changes in light conditions occurring at the optoelectric converter 34 represents, is intended for further electronic processing. That the Lighting conditions on the optoelectric converter 34 corresponding electrical image signal 37 is in particular by an analog signal 38 with a maximum amplitude formed in the range of a few volts.
- the images are on electrical image signals 37 representing document 3 to be read in for the further electronic data processing.
- the sampling frequency of the optoelectric converter 34 is on the transport speed of the document 3 in the scanner area coordinated so that a sufficient resolution of the flat side of the document to be scanned 3 is reached and any characters on the document 3 clearly from each other are distinguishable.
- a compensation device 39 is assigned to the reading unit 1, which adapts the electrical image signals 37 of the scanner device 25 accordingly.
- the compensation device 39 comprises an electrical correction circuit 40 for those fed to the scanner device 25 and / or for those from the scanner device 25 emitted electrical signals.
- the compensating device 39 can thus, depending on the tolerances of the respective Components of the reading unit 1 emitted electrical signals to the actuators the reading unit 1, e.g. the electrical drive signals for the transport device 17 or also the electrical signals emitted to the light sources 32, 33, Align in such a way that the tolerances inherent in these components are balanced become.
- those emitted by the passive components of the reading unit 1 are preferred electrical signals or sensor signals, including those from the optoelectric Transducers 34 output image signals 37 are to be classified via the compensation device 39, in particular adjusted in such a way via the electrical correction circuit 40, that the tolerances of the active components as well as the passive components or sensor elements of the reading unit 1 are canceled or ineffective.
- Reading unit 1 Because the tolerances of the components used in each individual, produced Reading unit 1 of the same type and structure are different, since the reading unit 1 summarized electrical or electromechanical components and Modules have a certain tolerance range, there is always a certain individuality when considering a single reading unit 1 with respect to a plurality of Reading units 1. Possible tolerances can e.g. in light sensitivity the optoelectric converter 34 or the CCD chip, in the case of the light sources 32, 33 and thus in the lighting of the document 3 as well as in the mechanical structure of the Reading unit 1, e.g. with the transport device 17, all of which occur would influence the scanning result if no compensation device 39 is provided would.
- This individually programmable linearization chip 41 can by standard available hardware modules from various manufacturers, e.g. be formed by a CCD processor.
- the compensation device 39 and the Linearization chip 41 is used once in the production process before the final test Reading unit 1 specifically matched to the respective reading unit 1. For initialization of the reading unit 1 or the scanner device 25 are thus used in the production of the Reading unit 1 once the respective correction data for the corresponding structure determined.
- the determination of this individual correction data for a very specific one Reading unit 1 or scanner device 25 can be provided by supplying a document 3 with test or reference samples. It is also possible to use the correction values through targeted measurements on the individual components, such as B. on optoelectric Converter 34 related to certain operating conditions, such as. B. an optical Scanning of the scanner area without the presence of a document 2 to determine.
- the storage device 42 is preferably a non-volatile one Read memory, such as by an EPROM or an EEPROM memory, educated.
- the storage device 42 is directly the scanner device 25 or the optoelectric converter 34 with the associated light sources 32, 33 and assigned to the lens arrangement 35.
- the storage device 42 with the individual Correction data thus forms a compact one with the actual scanner device 25 Unit or a scanning and storage module provided with defined interfaces 43.
- the memory device 42 with the correction data is preferably on arranged on the print plate of the scanner head and thus directly to the image data of the Assigned to document 3 generating component.
- the reading unit 1 is a control and / or Assigned evaluation device 44.
- the central control and / or evaluation device 44 of the reading unit 1 preferably consists of components of digital technology and includes, for example, at least one microcontroller 45 and / or timer modules and / or driver modules and / or signal conversion devices and / or further storage devices 46 for storing what is to be processed by the microcontroller 45 Program and / or for storing intermediate results or Calculation results or other data.
- the further storage device 46 serves but also for temporary storage of the non-volatile storage device 42 permanently saved correction data.
- the correction data when the reading unit 1 is started or initialized by the first storage device 42 into the further storage device 46 which is naturally a comparative one short access time is transmitted, so that the compensating device 39 required correction data are immediately available.
- the one for each reading unit 1 individually determined and permanently stored in the first storage device 42 Correction data are controlled each time the reading unit 1 is started from the control and / or evaluation device 44 serially into the further storage device 46, which is preferably formed by RAM memory modules.
- the further storage device 46 with the correction data retransmitted with each start-up can then from the correction circuit 40 or from the linearization chip 41 can be accessed much faster, especially in parallel.
- the control and / or evaluation device 44 is at least part of the active one and passive components of the reading unit 1 line-connected. So is the tax and / or Evaluation device 44 via at least one line 47, 48 each with the Detection devices 8, 26 and via at least one line 49, 50 with the Locking and releasing device 10 and connected to the drive device 20, so either the electrical signals emitted by these elements to be able to receive or the various components with corresponding electrical To be able to supply signals.
- the correction data are in digital form in the Storage device 42 stored and can by the control and / or evaluation device 44, in particular by the microcontroller 45, read out and subsequently are written into the further storage device 46.
- the from the storage device 42 or digital correction data read out from the further storage device are possibly further processed in the control and / or evaluation device 44 and a conversion device 52, in particular a digital / analog converter 53 fed.
- the conversion device 52 generates from the supplied digital ones Correction data on the output side a correction signal 54, in particular in analog Form, which with the analog signal 38 emitted by the scanner device 25, which is provided by the optoelectric converter 34 and the figures corresponds to document 3, is superimposed.
- the overlay of the correction data representing the analog correction signal 54 with the analog image signal 37 of the Optoelectric converter 34 takes place at an overlay 55, at which the correction signal 54 is combined with the image signal 37.
- This corrected image signal 56 is an analog signal that follows a further conversion device 57, which is formed in particular by an analog / digital converter 58 and which the corrected analog image signal 56 into corrected digital Converts image data.
- the control and / or evaluation device 44 is for receiving these digitized, corrected image data is formed and stored in one of the control and / or Intermediate memory 59 assigned to evaluation device 44.
- This buffer 59 is formed in particular by a shift register 60, which can record at least the image data of one scan line of document 2.
- This shift register 60 or this FIFO memory (first in first out) is preferred connected to the control and / or evaluation device 44 of the reading unit 1, so that these are provided for further processing or for further transmission are.
- the image data can also be formed by a microprocessor Interface 61 to a superordinate computer 62, in particular to a personal computer 63, are transmitted.
- the superordinate computer 62 processes the data from the read unit 1 and leaves them in a data network, e.g. in a banking data network.
- the computer 62 executes an OCR program which contains the graphic image information converted into electronically processable text information or text files.
- bus system 64 All bus systems known from the prior art can be used for transmission of data are used. However, the standardized one is preferred Centronics parallel interface or a USB interface (universal serial bus) for data transmission between the superordinate computer 62 and the optoelectric Reading unit 1 used.
- the light emitted by the detection devices 8, 26 is preferably from the Control and / or evaluation device 44 monitors. Detects the tax and / or Evaluation device 44 a change in light intensity, so the Electric current supplied to detection devices is adjusted accordingly, so that Signs of aging and / or minor contamination largely compensated are and the detection accuracy is largely maintained. Leave the Post-adjustment parameters have certain limits, so the tax and / or Evaluation device 44 preferably relates to a cleaning or maintenance instruction the detection devices 8, 26 are output.
- the 2 shows a greatly simplified block diagram of the most important components the electronics for the reading unit 1 and a scanner electronics 65 for the reading unit 1.
- this scanner electronics 65 are the compensation device 39, the optoelectric converter 34, the storage device 42, 46 for the correction values of the scanner device 25 and the intermediate memories 59 or shift register 60, which a computer bus 66 of the control and / or evaluation device 44 of the reading unit 1 are assigned to understand.
- the control and / or evaluation device 44 the scanner electronics 65 is in particular formed by a microprocessor 67 which can transmit and receive data in digital form via the computer bus 66.
- the Computer bus 66 comprises, as is known per se, a data bus 68, an address bus 69 or a combined address / data bus.
- the data bus 68 and address bus 69 comprise multiple lines to multiple bits one To be able to transmit data word simultaneously.
- the computer bus 66 also includes one Control bus 70 with multiple control lines, e.g. a read / write line 71 and a selector line 72 (chip select) for selecting certain component groups, in particular for the targeted selection of certain memory modules.
- the compensating device 39 comprises one CCD processor as linearization chip 41.
- This linearization chip 41 or CCD processor is with the optoelectric converter 34, in particular with the CCD element Line-connected to the image signals 37 output by this analog To be able to process signal form.
- the linearization chip 41 is over the Data bus 68 with the further storage device 46 with the stored correction values to compensate for the tolerances of the reading unit 1 wired to the to be able to quickly read in the corresponding correction values.
- the first is not volatile memory device 42 is connected to data bus 68 to during the Start phase the permanently stored correction data controlled by the control and / or To be able to transfer evaluation device 44 into further storage device 46.
- the linearization chip 41 has direct access to the storage device 46 so that comparatively high data transmission rates are possible.
- the compensation device 39 or the linearization chip 41 overlays the incoming one Image signal 37 with one corresponding to the correction values in the storage device 42 Correction signal 54.
- the linearization chip 41 changes or CCD processor the signal values obtained from the individual scanning pixels of the analog signal 38 as a function of the assigned to each individual scanning pixel Correction values in the storage device 42, 46.
- the equalization device 39 or the linearization chip 41 therefore has for everyone pixel to be scanned from document 3 or a correction value for each pixel in the Storage device 42 or 46 deposited, which when reading the image signal 37th assigned to the individual signal values.
- the compensation device 39 or correction circuit 40 adds the individual signal values, for example of the image signal 37 associated correction values the respective image signal values the correction circuit 40 adds or subtracts the correction values from the individual Signal values of the image signal 37.
- the correction of the optoelectric Converter 34 output image signals 37 via the compensation device 39 takes place in real time, i.e. the data processed by the equalizer 39 not cached in it but processed immediately and immediately forwarded.
- the linearization chip 41 adds those from the individual pixels obtained values with the associated values stored in the storage device 46 Correction values and therefore carries out an offset adjustment. Multiplied further the linearization chip 41 the values obtained from the individual pixels with the associated correction values and stored in the storage device 46 thus scales the scan image. Of course it is also possible the offset adjustment and the scaling of the scan image by mathematical Subtractions and divisions of the sample values with the correction values via the correction circuit 40 to perform.
- the corrected, analog image signal 56 generated by the compensation device 39 is then digitized and placed on the data bus 68.
- the corrected digital image data from the compensation device 39 or from the CCD processor transferred to the buffer 59 or to the shift register 60.
- the Control and / or evaluation device 44 or the microprocessor 67 of the reading unit 1 subsequently reads the corrected image data supplied to the shift registers 60 via the computer bus 66.
- the scanner electronics 65 include at least two shift registers 60, into which the corrected image data generated by the linearization chip 41 is inserted in a clocked manner become.
- the data bus 68 and the address bus 69 of the computer bus 66 are at least in each case an electronic buffer memory 73, 74 for temporarily storing addresses and data of the computer bus 66.
- the buffer memories 73, 74 serve to temporarily store addresses and data, from the control and / or evaluation device 44 to the other components the scanner electronics 65 are transmitted or they are used for temporary storage the data or addresses of the respective components of the scanner electronics 65 during transmission to the control and / or evaluation device 44.
- the data bus 68 accordingly provides a line connection between the control and / or Evaluation device 44, the shift register 60, the buffer memory 74, the Storage devices 42, 46 and the linearization chip 41 forth.
- the address bus 69 provides a line connection for the transmission of addresses between the control and / or Evaluation device 44, the buffer memory 73 for temporary storage of addresses, the storage devices 42, 46 for the correction values and a flow control device 75 ago.
- the sequence control device 75 controls the time sequences of the scanner electronics 65 and is for this purpose via several control lines 76, 77 with the optoelectric Converter 34 and additionally via several control lines 78, 79 with the linearization chip 41 wired.
- the flow control device 75 via at least one control line 80, 81 each with one of the shift registers 60 Connected to the line in order to be able to control them in a clocked manner.
- the sequence control device 75 which takes over the timing of the scanner electronics 65 is for the initiation of the sequence program via at least one additional control line 82 can be activated.
- the control and / or evaluation device 44 of the mechanical components of the Reading unit 1 directly associated or mounted on this scanner electronics 65 is particularly supported by the microprocessor 67, e.g. Intel 80386 SX.
- the software program to be processed by the microprocessor 67 is in one of these assigned data memory 83, which e.g. with flash EPROM memory modules is formed, which corresponds to the respective lines of the computer bus 66 are connected.
- the data memory 83 assigned to the microprocessor 67 comprises a further one electronic storage device for storage or temporary storage intermediate results of the microprocessor 67.
- This further memory device the data memory 83 is preferably a dynamic, volatile memory, formed in particular in the manner of a DRAM, which with the corresponding lines the computer bus 66 is connected.
- the microprocessor 67 is the scanner electronics 65 via at least one interface 61, which e.g. through a Centronics or a USB interface is formed with the superordinate computer shown in Fig. 1 62, e.g. connected in a bank terminal. Via this interface 61 with the these associated conversion devices 84, 85 for converting the respective transmission protocol can the image data scanned from the document 3 via the reading unit 1 transmitted in electrical form to the superordinate computer 62 - see FIG. 1 which is then the further processing of this image information, for example through an OCR program.
- This axis of rotation 86 of a joint arrangement 87 runs preferably transversely to the feed or transport direction - arrow 7 - of the document 3 in the area of the scanner device 25 and essentially parallel to the preferred glass contact surface 30 of the document 3 on the actual scanner device 25.
- This is at least from the optoelectric converter 34, the lens arrangement 35, the light sources 32, 33 and the scanner head with the storage device 42 for the correction data formed unit about this axis of rotation 86, e.g. for cleaning the transparent cover plate of this unit, pivotable if necessary.
- the adjustment of the scanner device 25 from a rest position shown in FIG. 1 is in a different pivoting position via an adjusting and / or locking device 88 enables. This is preferred manually by the maintenance staff the adjustment and / or locking device 88 to be operated by the reading unit 1 can Pivotal movement of the scanner device 25 about the axis of rotation 86 released or be locked.
- the adjustment and / or locking device 88 locks the scanner device 25 in the normal state such that the contact surface 30 for the document 3 in essentially parallel to the guide device 6 or to the guide track in the area of the scanner device 25 and continues essentially continuously.
- the adjustment and / or locking device 88 which for example by a locking lever or a bayonet lock can be formed by the maintenance personnel or responsible owner after removing any housing covers placed on the reading unit 1 in the release position, so the scanner device 25 as a structural unit together with the contact surfaces 30 on the transparent cover plate pivoted about the axis of rotation 86 in a position favorable for cleaning become.
- the transparent contact surface 30 for the document 3 is free accessible, since these are preferably provided by pressing devices 31 or by Rolling the transport device 17 is moved away and thereby a thorough Cleaning due to good accessibility is possible.
- Starting or rest position in which a scan of incoming documents 3 is possible and in which the contact surface 30 substantially parallel to the flat side of incoming documents 3 is aligned, be pivoted back.
- the locking means of the adjustment and / or locking device 88 preferably activated automatically, so that the scanner device 25 automatically is locked with the swiveling back into the starting position.
- the scanner device 25 is different of the schematic representation in Fig. 1, preferably the upper flat side of an incoming Assigned to document 3.
- the transparent plate with the contact surface 30 for document 3 of the upper flat side of document 3 and assigned is in direct contact with them.
- the pressing device 31, which is preferred through a transverse to the transport direction - arrow 7 - of the document 3 in the scanner area extending drive roller 18 is formed, is the lower flat side of the document 3 assigned and presses this as flat as possible against the one above Contact surface 30.
- the pivot axis or center line of the pressing device 31 or The pressure roller runs exactly parallel to the longitudinal extension of the optoelectric Converter 34 and exactly parallel to the plane of the contact surface 30.
- the scanner device 25 with the transparent cover plate for the light sources 32, 33, the lens arrangement 35 and the optoelectric Converter 34 can be pivoted about the rotation axis 86 by approximately 180 °, the cover plate be viewed and inspected directly.
- the usually on the bottom Flat side of the cover plate formed contact surface 30 can thus by means of the hinge arrangement 87 viewed from above for cleaning purposes be put in the original position for the scanning process, in which is an accumulation of paper residues or dust particles on the contact surface 30 is largely prevented.
- the reading unit 1 can also have an alignment device 89 for the alignment of canted documents introduced into the reading unit 1 2 or documents 3 have.
- This alignment device 89 is based on the Feed or transport direction - arrow 7 - of the document 3 preferably in front of the scanner device 25 arranged for the optical scanning of the document 3 to be read.
- the alignment device 89 in the area between the locking and release device 10 and the scanner device 25 arranged to be operated by the operator of the reading unit 1 slanted documents 3 before the actual scanning process to be able to align the alignment device 89 uniformly with regard to its orientation.
- this alignment device 89 By means of this alignment device 89 it is thus achieved that a central axis 90 of the document 3 to be scanned essentially at right angles to a longitudinal central axis 91 of the optoelectric converter 34 or substantially at right angles to the axis of rotation the roller-like pressing device 31 in the area of the scanner device 25 is aligned before the document 3 is conveyed through the scanner device 25.
- the reading unit 1 can be skewed by the operator actual feed or transport direction - arrow 7 - inserted document 3 over the released locking and unlocking device 10 on the scanner area be fed.
- the transport of the document 3 is carried out by the electromotive Transport device 17 accomplished.
- the transport device 17 is controlled from the control and / or evaluation device which can be seen in particular from FIG. 1 44 stopped.
- the document 3 is preferably carried under Action of the drive and transport rollers 18, 19 on a lower and upper flat side 92, 93 of the document 3.
- the stops Transport device 17 and the drive and / or transport rollers 18, 19 are from the lower or the upper flat side 92, 93, but in particular from the upper Flat side 93 lifted off, so that the friction of the rollers of the transport device 17 is canceled with at least one flat side 92, 93 of document 3.
- the elimination of the frictional connection between document 3 and the funding of Transport device 17 is made possible by an adjusting device 94 which the drive or transport rollers 18, 19 in the vertical direction of the Flat pages 92, 93 forming levels of the document 3 can be moved away.
- the adjusting device 94 is with the control and / or evaluation device 44 Reading unit 1 wired and controlled by this.
- the adjustment movement of the Drive or transport rollers 18, 19 in the vertical direction to the flat sides 92, 93 of document 3 can e.g. by means of electromotive or electromagnetic drive means 95, such as Tie rod magnets can be reached.
- the adjustment movement of the Drive or transport rollers 18, 19 can thereby by a pivot lever bearing - as shown in Fig. 3 - or also by translational bearing devices, such as. bearing journals of the rollers guided in vertical guideways can be achieved, the drive means controlled by the control and / or evaluation device 44 95 initiate the adjustment movement of the adjustment device 94.
- the alignment device 89 is activated.
- the alignment device 89 comprises at least one transverse conveyor device 96, the one Shift of the document 3 transversely to the usual feed or transport direction - arrow 7 - causes.
- this transverse conveyor device 96 has transverse conveyor means 97 which are preferably formed by transverse conveyor rollers 98 or transverse conveyor rollers, the Axis of rotation 99 parallel to the usual feed or transport direction - arrow 7 - of the document 3 runs.
- the axes of rotation 99 of the cross conveyor 97 run transverse to the axes of rotation of the drive or transport rollers 18, 19 of the transport device 17 and essentially parallel to the flat pages 92, 93 of the document 3.
- Die Cross conveyor 97 of the cross conveyor 96 are at least one Flat page 92, 93 of document 3 in frictional engagement.
- the transverse conveyors are preferably located 97 but with the lower flat side 92 of document 3 in frictional contact.
- transverse conveying means 97 or transverse conveying rollers 98 100 By means of the drive means assigned to the transverse conveying means 97 or transverse conveying rollers 98 100 these can be controlled by the control and / or evaluation device 44 in Rotational movement are offset and thus move the document 3 transversely to the usual Feed or transport direction - arrow 7 - towards a stop element 101.
- the frictional connection is between the preferably lower flat side 92 of the document 3 high that a reliable cross promotion of document 3 takes place.
- the cross conveyor 96 is activated at least until one of the stop element 101 facing side edge 102 of document 3 largely continuously on a stop surface 103 of the strip-shaped stop element 101 rests.
- FIG. 4 shows another exemplary embodiment of the scanner electronics 65 for the reading unit 1, the same reference numerals for components already described above be used.
- This scanner electronics 65 is in particular for the rapid transmission of the read Image data of a document or document directly in the access area of a Personal computer 108 is formed.
- this scanner electronics 65 the read image data of the document via the in the personal computer 108 used PC bus 109 directly into a PC main memory 110 of the personal computer 108 transmitted.
- the personal computer 108 is for further processing, evaluation, transmission and / or integration of the data available on the document into a regional data network, e.g. into a data network of the lottery system and / or for visualization of the image data generated by the reading unit 1.
- the basic, electronic Components of the scanner electronics 65, excluding the scanning and Memory module 43 are preferably arranged on a printed circuit board, which in one free slot of the personal computer 108 can be inserted and thus directly with the PC bus 109 is in electrical connection.
- the PC bus 109 in the personal computer 108 is in particular formed by a PCI bus, via which the Microprocessor of the personal computer 108 data with the peripheral components exchanges.
- the scanner electronics 65 in turn comprises a correction circuit 40 for the Comparison of the image data provided by the scanner device 25.
- the correction circuit here comprises at least two linearization chips 41, which are those of the Scanner device 25 or analog output by the optoelectric converter 34 Process image signals 37.
- the two linearization chips 41 stand with the additional storage device 46, which in particular by a correction data memory 111 is formed from RAM memory modules with fast access, in line connection.
- This the two linearization chips 41 of the compensation device 39 assigned correction data memory 111 serves to temporarily store the correction data to be processed by the linearization chips 41 from the first, in particular memory device 42 formed by EEPROM memory chips in the scanner head.
- Those from the scanner device 25 or from the optoelectric converter 34 provided image data are thus parallel in this embodiment picked up and processed by at least two linearization chips 41, in particular, the tolerances inherent in the reading unit 1 are eliminated or canceled.
- the control and / or evaluation device 44 of this scanner electronics 65 is in particular by the microprocessor 67 and by the flow control device 75 formed.
- a central control function of the reading unit 1 Flow control device 75 is, in particular by a freely programmable Gate arrangement or by at least one FPGA module (Free Programmable Gate array).
- the flow control device 75 is thus programmed by a fix Module formed in which the corresponding flow logic is stored and which controls the peripheral components of the reading unit 1 accordingly.
- the flow control device 75 is also with the microprocessor 67 of the Scanner electronics 65 wired.
- the computer bus 66 of the scanner electronics 65 in turn comprises at least one data bus 68, an address bus 69 and a control bus 70.
- the data bus 68 connects the data ports of the linearization chips 41 with the corresponding data inputs and - outputs the buffer 59, which in particular by RAM memory modules are formed with the data port of the flow control device 75.
- the address bus 69 connects the address ports of the memory modules of the buffer 59 with the address port of the flow control device 75.
- each Memory module of the buffer 59 has at least one Read / write line 71 which connects the corresponding memory module to a write or Set reading process and at least one dial line, but preferably for each memory chip its own dial-up line 72, which contains the memory module to be addressed switches active or inactive.
- the scanner electronics 65 have at least one further control and Address bus 112, which with each of the linearization chips 41 and with the Correction data memory 111 associated with linearization chips 41 is electrically connected is and also has its origin on the flow control device 75.
- the control and address bus 112 can be a combined control and address bus 112 be trained, i.e. the lines of the control and address bus 112 are delayed used for the transmission of control and address data.
- the Control and address bus 112 each have their own lines for the transmission of control and Have address data.
- the address lines of the control and address bus 112 are included preferably assigned to the correction data memory 111 for the correction data.
- the two linearization chips 41 are via a further control bus 113 with the microprocessor 67 of the control and / or evaluation device 44 line-connected.
- This control bus 113 has at least two control lines, wherein this among other things for the configuration or initialization of the linearization chips 41 are used.
- the linearization chips 41 are accordingly on the one hand via the control and address bus 112 from the flow control device 75 and on the other hand via the control bus 113 controlled and / or configured and / or initialized and / or controlled by the microprocessor 67 controlled.
- the storage device 42 which contains the correction data for canceling the tolerances the components of the reading unit 1, in particular the correction data for the cancellation the tolerances inherent in the scanner head is above at least a line 114, in particular via a data bus 115 to the microprocessor 67 wired.
- the microprocessor 67 can store the data in the storage device 42 read out stored correction data and to the correction circuit 40, in particular to the further storage device 46 or also to the flow control device 75 handed over.
- the first storage device 42 is directly the scanner device 25 assigned and forms a largely independent module with this predefined interfaces to the other components of the scanner electronics 65.
- the correction data is at least every time the reading device starts up 1 is read out serially from the first storage device 42 and into the further storage device 46 or transferred to the correction data memory 111 on which then for the linearization chips 41 much faster, in particular parallel access with a comparatively high data transfer rate.
- the sequence control device 75 is connected to the Scanner device 25 wired, especially to the timing of the scanner device 25 to determine and control according to the requirements.
- the detection devices 8, 26 can be controlled and queried via at least one line 48. Furthermore, the drive device 15, 20 and any other electromotive Drive devices of the reading unit 1 via at least one line 50 the flow control device 75 line-connected.
- the drive devices 15, 20 are preferably formed by stepper motors, whereby this at least one Motor control device 116 is arranged upstream.
- a document to be read in via the reading unit 1 is now sent via the scanner device 25, which is constructed in particular in the manner of a contact scanner 28, optically scanned.
- the image data generated in the process is sent to the correction circuit 40 by means of electrical Pass signals in analog form.
- the correction circuit 40 and the Linearization chips 41 read in the image data and calculate the tolerance-related ones Deviations of the reading unit 1 or the scanner device 25 away.
- the corrected Analog image signals are then converted into digital via the linearization chips 41 Data converted and temporarily in digital form in the buffer stores 59 on one PCI bus card of personal computer 108 cached.
- the data transfer rate is more than 10 MB / s. This makes it possible for scanning and optical character recognition (OCR) or OMR (Optical Mark Recognition) largely run concurrently, creating a significant Time saving compared to a sequential solution is achieved.
- correction data in the storage device 42 and 46 are taken into account the different, scatter-related sensitivities of the individual scanning elements of the optoelectric converter 34. These correction data are thereby at the initialization of the reading unit 1 by means of actual value measurements and comparison determined with target values and permanently stored in the storage device 42 in order to subsequently, the most exact possible cancellation of these tolerances using the To enable linearization chips 41.
- the reading unit 1 can also have an output device 105 to output certain data.
- the output device 105 is preferred for applying data to document 2 or the document 3 and can e.g. by a printer unit 106 and / or by a Stamp unit 107 for endorsing the document 3 to be bank or lottery-specific To be able to apply data to document 3 as permanently as possible.
- the applied text or the applied characters can subsequently by any People can be read without tools.
- Placement of plain text on document 3 Via the output device 105, a line printing unit in the manner of a Matrix, ink and / or as a laser printer.
- the printer unit 106 and the Stamp unit 107 is here with the control and / or evaluation device 44 Reading unit 1 and / or line-connected to the superordinate computer 62 in order to of this received data, if possible, in plain text on receipt 3 can.
- the output device 105 is preferably based on the usual feed or Transport direction - arrow 7 - arranged in front of the scanner device 25. As in Fig. 1 but it is also shown that the output device 105 is based on the conventional one Feed or transport device - arrow 7 - after the scanner device 25 to arrange.
- the document 3 to be printed is also transported via the transport device 17, which is a relative movement between the document 3 and the output device 105 allows. Following the optical scanning of the document 3 via the scanner device 25 or following the printing of document 3, this will be via the transport device 17 either in a collecting container or in a Stack memory stored or also to the respective operator of the reading unit 1 output.
- the transport device 17 For the issuance of voucher 3 to the owner of voucher 3 or to Operator of the reading unit 1 is preferably given the document 3 contrary to the usual feeding or transport direction conveyed back via the transport device 17 and at the Feed opening 4 provided for removal thereof.
- the scanner device 25 it is also possible to use the scanner device 25 to detect Train color information. Either multiple scanner devices can be used for this 25 for recording different colors, based on the usual Transport or feed direction - arrow 7 -, can be arranged one after the other a combined scanner device 25 can also be arranged, which at least for Detection of the three primary colors red, green and blue is arranged.
- an optoelectric converter 34 or CCD chip which illuminant or light sources 32, 33 for emitting white Light are assigned and which is designed for the direct acquisition of color information is, which achieves comparatively short throughput or acquisition times become.
- FIG. 5 shows a detailed design of the reading unit 1 according to the invention, whereby for Parts already described above, the same reference numerals are used.
- Fig. 5 is in the immediate scanning area of the scanner device 25 document 3 is shown. Relative to the usual feed or transport direction - according to arrow 7 - document 3 is located directly in front of a scanner head 117 of the scanner device 25.
- the document 3 is relative to the scanner device via the transport device 17 25 movable.
- the transport device 17 preferably transports the document 3 relatively to the stationary scanner head 117.
- the scanner head 117 or the scanner device 25 via the transport device 17 to move relative to a fixed document 3.
- the transport device 17 preferably comprises drive and / or drives which can be driven by an electric motor Transport rollers or rollers with at least one flat side 92, 93 of the Document 3 to be imported is in a frictional connection to ensure safe propulsion to ensure.
- the drive and / or transport rollers 18, 19 are preferred. with the exception of the pressing device 31, by means of a plurality arranged at a distance from one another and circular disks arranged on a common axis of rotation are formed, so that only partial areas of the document 3 with the surface of the drive and / or Transport rollers 18, 19 are contacted.
- there is the previous described design of the drive and / or transport rollers 18, 19 only a contact at certain intervals running transversely to the direction of transport - arrow 7 with document 3 so that wrinkles are prevented as far as possible.
- the scanner head 117 for the optoelectric scanning of the document 3 is modular as an essentially independent unit with predetermined interfaces to the peripheral units of the reading unit 1, in particular the scanning electronics 65 educated.
- the scanner device 25 or the scanner head 117 comprises in particular the light sources 32, 33, the lens arrangement 35, the optoelectric converter 34 and at least a scanner head board 119 with the storage device 42 for the correction data.
- the aforementioned electrical, optoelectric and optical components of the scanner device 25 are in a housing-like receiving frame 120 supported.
- This receiving frame 120 preferably has a cross section according to FIG. 5 a, substantially U-shaped cross-section, in which of the legs and the base plate enclosed space arranged the aforementioned components are.
- the interior of the substantially U-shaped receiving frame 120 is by a transparent cover plate 121, which is in contact with the legs, which is preferred is made of glass, closed off from the surrounding area.
- the line-shaped light sources 32, 33 preferably by means of LED strips are formed, arranged before and after the optoelectric converter 34, so that the Document 3, based on the optoelectric converter 34, is illuminated on both sides and thus light reflections on the rough paper surface can be avoided.
- the transparent cover plate 121 stands during the reading process with the one to be scanned Flat side 93 of the document in the greatest possible contact, which creates air gaps largely between the transparent cover plate 121 and the upper flat side 93 excluded are.
- the center axes of the optoelectronic converter 34, the lens arrangement 35 and the axis of rotation of the drive roller in particular Pressing device 31 lie on a common vertical axis 122.
- This vertical axis 122 thus represents an axis of symmetry of the optoelectric converter 34 or the CCD chip, the lens arrangement 35 and the pressing device 31
- the two rod-shaped light sources 32, 33 are also preferred arranged symmetrically to this vertical axis 122.
- the pressing device 31 preferably by a driven or Transport device 17 counting roller formed, which is preferably about the entire width of the document 3 a flexible or spring-elastic jacket area, in particular made of foam.
- the scanner device 25 or the scanner head 117 is in the reading unit 1 mounted translationally and / or rotationally via a bearing device 123.
- bearing device 123 comprises a joint and / or guide device 124, which rotates the scanner device 25 or the scanner head 117 and / or stored translationally according to arrows 125 and 126.
- the joint and / or guide device 124 enables an adjustment of the Scanner head 117 in the vertical direction relative to the guide device 6 and Guideway for document 3 and a pivoting one across the direction of transport and pivot axis substantially parallel to the flat sides 92, 93 127.
- the receiving frame 120 has at least one bearing journal 128 with a circular cross-section, which in a vertical guide designed as an elongated hole 129 is used. There is thus a pivoting of the scanner head 117 or the receiving frame 120 - according to arrow 125 - about the pivot axis 127 and at the same time a translational displacement of the same via the vertical guide 129 - according to arrow 126 - possible.
- the pivot axis 127 of the journal 128 and the The longitudinal center axis of the slot-like vertical guide 129 is also on the Vertical axis 122.
- the bearing journal 121 is preferably integrally formed on the receiving frame 120 and in one vertical guide 129 incorporated in the mechanical parts of the reading unit 1.
- the vertical guide 129 is also possible to mount the vertical guide 129 on the receiving frame 120 assign and the journal 128 on the mechanical parts of the Provide guide device 6 or the reading unit 1.
- a distance 130 between the contact surface or contact line for the document 3 the pressing device 31 or on the guide device 6 and the contact surface 30 of the scanner head 117 on the upper flat side 93 of the document 3 is the same or slightly smaller than a customary thickness 131 of the documents 3 to be imported it is achieved that the scanner head 117 is full on the upper flat side 93 of the document 3 is present and thus ensures intimate contact with document 3.
- the rotary and / or translational mounting of the scanner head 117 allows a problem-free Entry of the document 3 below the scanner device 25 without in this case, congestion or disturbances can occur when the receipt 3 is received.
- the scanner head 117 preferably has a problem-free entry and exit of the Document 3 in or out of the scanning area at least one beveled interconnect 132 on.
- the interconnects 132 can by the receiving frame 120 itself or be formed by independent guiding surfaces.
- the scanner device 25 with the optoelectric Transducer 34 preferably faces the upper flat side 93 of document 3 and the lamps 32, 33 emit their light in the direction of this upper flat side 93.
- The preferably from a plurality of light emitting diodes or from a light emitting diode with one Light diffusers over the scanning width of existing illuminants 32, 33 are related to the usual feed or transport direction - arrow 7 - of document 3 in each case arranged before and after the optoelectric converter 34. It can also be seen that that emitted by the light sources 32, 33 and from the flat side 93 of the document 3 refracted light via the lens arrangement 35, in particular via the gradient lens 36 on the optoelectric converter 34 with the individual optoelectric Elements.
- the scanner device 25 or the scanner head 117 is by means of the receiving housing 120 and the cover plate 121 dustproof but permeable to air humidity trained so that contamination in the interior but also condensate problems are largely avoided.
Description
- Fig. 1
- einen prinzipiellen Aufbau der erfindungsgemäßen Leseeinheit anhand eines stark vereinfachten, schematisierten Prinzip- und Blockschaltbildes;
- Fig. 2
- ein Blockschaltbild der wesentlichsten in der Leseeinheit eingesetzten elektrischen Komponenten zur Verdeutlichung des Zusammenwirkens und der Zusammenschaltung der einzelnen Baugruppen;
- Fig. 3
- eine mögliche Ausbildung der Leseeinheit im Bereich der Scannervorrichtung in Draufsicht und stark vereinfachter, schematischer Darstellung;
- Fig. 4
- eine weitere Ausbildungsvariante der in der Leseeinheit eingesetzten Elektronik zur direkten Bilddatenübertragung in einen Personal-Computer als Blockschaltbild in stark vereinfachter, schematischer Darstellung;
- Fig. 5
- ein Ausschnitt aus der Leseeinheit im Scannerbereich in Seitenansicht und stark vereinfachter, schematischer Darstellung.
- 1
- Leseeinheit
- 2
- Dokument
- 3
- Beleg
- 4
- Zuführöffnung
- 5
- Gehäuseteil
- 6
- Führungsvorrichtung
- 7
- Pfeil
- 8
- Detektionsvorrichtung
- 9
- Infrarotlichtschranke
- 10
- Sperr- und Freigabevorrichtung
- 11
- Shutter
- 12
- Welle
- 13
- Durchbruch
- 14
- Achse
- 15
- Antriebsvorrichtung
- 16
- Elektromotor
- 17
- Transportvorrichtung
- 18
- Antriebsrolle
- 19
- Transportrolle
- 20
- Antriebsvorrichtung
- 21
- Elektromotor
- 22
- Umsetzvorrichtung
- 23
- Getriebeeinheit
- 24
- Abstand
- 25
- Scannervorrichtung
- 26
- Detektionsvorrichtung
- 27
- Infrarotlichtschranke
- 28
- Kontaktscanner
- 29
- Oberflächenbereich
- 30
- Anlagefläche
- 31
- Andrückvorrichtung
- 32
- Lichtquelle
- 33
- Lichtquelle
- 34
- Wandler (optoelektrisch)
- 35
- Linsenanordnung
- 36
- Gradientenlinse
- 37
- Bildsignal
- 38
- Analogsignal
- 39
- Ausgleichsvorrichtung
- 40
- Korrekturschaltung
- 41
- Linearisierungs-Chip
- 42
- Speichervorrichtung
- 43
- Abtast- und Speichermodul
- 44
- Steuer- und/oder Auswertevorrichtung
- 45
- Mikrokontroller
- 46
- Speichervorrichtung
- 47
- Leitung
- 48
- Leitung
- 49
- Leitung
- 50
- Leitung
- 51
- Leitung
- 52
- Umsetzvorrichtung
- 53
- Digital/Analog-Wandler
- 54
- Korrektursignal
- 55
- Überlagerungsstelle
- 56
- Bildsignal
- 57
- Umsetzvorrichtung
- 58
- Analog/Digital-Wandler
- 59
- Zwischenspeicher
- 60
- Schieberegister
- 61
- Schnittstelle
- 62
- Rechner
- 63
- Personal-Computer
- 64
- Bussystem
- 65
- Scannerelektronik
- 66
- Rechnerbus
- 67
- Mikroprozessor
- 68
- Datenbus
- 69
- Adreßbus
- 70
- Steuerbus
- 71
- Schreib-/Leseleitung
- 72
- Wählleitung
- 73
- Pufferspeicher
- 74
- Pufferspeicher
- 75
- Ablaufkontrollvorrichtung
- 76
- Steuerleitung
- 77
- Steuerleitung
- 78
- Steuerleitung
- 79
- Steuerleitung
- 80
- Steuerleitung
- 81
- Steuerleitung
- 82
- Steuerleitung
- 83
- Datenspeicher
- 84
- Umsetzvorrichtung
- 85
- Umsetzvorrichtung
- 86
- Drehachse
- 87
- Gelenksanordnung
- 88
- Verstell- und Arretiervorrichtung
- 89
- Ausrichtvorrichtung
- 90
- Mittelachse
- 91
- Längsmittelachse
- 92
- Flachseite
- 93
- Flachseite
- 94
- Verstellvorrichtung
- 95
- Antriebsmittel
- 96
- Querfördervorrichtung
- 97
- Querfördermittel
- 98
- Querförderrolle
- 99
- Drehachse
- 100
- Antriebsmittel
- 101
- Anschlagelement
- 102
- Seitenkante
- 103
- Anschlagfläche
- 104
- Förderband
- 105
- Ausgabevorrichtung
- 106
- Druckereinheit
- 107
- Stempeleinheit
- 108
- Personal-Computer
- 109
- PC-Bus
- 110
- PC-Hauptspeicher
- 111
- Korrekturdatenspeicher
- 112
- Steuer- und Adreßbus
- 113
- Steuerbus
- 114
- Leitung
- 115
- Datenbus
- 116
- Motorsteuervorrichtung
- 117
- Scannerkopf
- 118
- Kabel
- 119
- Scannerkopfprintplatte
- 120
- Aufnahmerahmen
- 121
- Abdeckplatte
- 122
- Vertikalachse
- 123
- Lagervorrichtung
- 124
- Gelenks- und/oder Führungsvorrichtung
- 125
- Pfeil
- 126
- Pfeil
- 127
- Schwenkachse
- 128
- Lagerzapfen
- 129
- Vertikalführung
- 130
- Abstand
- 131
- Dicke
- 132
- Leitbahn
- 133
- Detektionsvorrichtung
Claims (36)
- Leseeinheit für ein Dokument, mit einer Steuer- und/oder Auswertevorrichtung (44) und mit einer Scannervorrichtung (25) zum Lesen des Dokumentes, mit einer Führungsvorrichtung für das Dokument und mit einer Transportvorrichtung (17) für die Relativverstellung zwischen Dokument und Scannervorrichtung, wobei die Steuerund/oder Auswertevorrichtung eine Ausgleichsvorrichtung (39) mit Korrekturwerten für die Korrektur der von einem optoelektrischen Wandler der Scannervorrichtung abgehenden Bildsignale in Echtzeit aufweist und die für den optoelektronischen Wandler (34) jeweils individuellen Korrekturwerte zumindest durch Vergleich von Sollwerten eines Referenzdokumentes mit den vom optoelektrischen Wandler abgegebenen Istwerten der Bildsignale des Referenzdokumentes ermittelt und in einer ersten Speichervorrichtung (42) dauerhaft hinterlegt sind, dadurch gekennzeichnet, daß die erste Speichervorrichtung (42) für die Korrekturwerte direkt an einem Scannerkopf (117) der Scannervorrichtung (25) und/oder am optoelektrischen Wandler (34) angeordnet ist und mit diesem ein einstückiges Bauteil mit vordefinierten Schnittstellen zu den peripheren, elektronischen Komponenten, insbesondere zu einer Scannerelektronik (65) bildet und die Steuer- und/oder Auswertevorrichtung (44) zumindest bei jeder Hochlaufphase zur Übertragung der Korrekturdaten von der ersten nicht flüchtigen Speichervorrichtung (42) in eine weitere Speichervorrichtung (46) der Steuerund/oder Auswertevorrichtung (44) ausgebildet ist und diese weitere Speichervorrichtung (46) eine im Vergleich zur ersten Speichervorrichtung (42) raschere Zugriffsmöglichkeit und höhere Datenübertragungsrate aufweist.
- Leseeinheit nach Anspruch 1, dadurch gekennzeichnet, daß die Ausgleichsvorrichtung (39) zum Überlagern des Bildsignals (37) mit einem den Korrekturwerten in der weiteren Speichervorrichtung (46) entsprechenden Korrektursignal (54) ausgebildet ist.
- Leseeinheit nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Ausgleichsvorrichtung (39) zumindest einen Linearisierungs-Chip (41) aufweist, der mit der weiteren Speichervorrichtung (46) für die Korrekturwerte sowie mit der Scannervorrichtung (25) leitungsverbunden ist und zur Einbindung der verfügbaren Korrekturwerte in das von der Scannervorrichtung (25) eingehende, analoge Bildsignal (37) ausgebildet ist, sodaß ein korrigiertes Bildsignal (56) resultiert.
- Leseeinheit nach Anspruch 3, dadurch gekennzeichnet, daß die Linearisierungs-Chips (41) der Ausgleichsvorrichtung (39) das korrigierte, analoge Bildsignal (56) ausgangsseitig als digitale Bilddaten ausgeben.
- Leseeinheit nach Anspruch 3 oder 4, dadurch gekennzeichnet, daß die Linearisierungs-Chips (41) zur Weiterleitung der korrigierten, digitalen Bilddaten über einen Rechnerbus (66) an die Steuer- und/oder Auswertevorrichtung (44) ausgebildet sind.
- Leseeinheit nach Anspruch 5, dadurch gekennzeichnet, daß die Linearisierungs-Chips (41) zur Übergabe der korrigierten, analogen Bilddaten des Dokumentes (2) über den Rechnerbus (66) an einen Zwischenspeicher (59) der Steuerund/oder Auswertevorrichtung (44) ausgebildet sind.
- Leseeinheit nach Anspruch 6, dadurch gekennzeichnet, daß der Zwischenspeicher (59) über einen Datenbus (68) des Rechnerbusses (66) mit der Steuerund/oder Auswertevorrichtung (44) leitungsverbunden ist.
- Leseeinheit nach Anspruch 7, dadurch gekennzeichnet, daß der über den Datenbus (68) mit den Linearisierungs-Chips (41) sowie mit der Steuer- und/oder Auswertevorrichtung (44) leitungsverbundene Zwischenspeicher (59) für die korrigierten, digitalen Bilddaten durch mehrere Schieberegister (60) gebildet ist.
- Leseeinheit nach Anspruch 7 oder 8, dadurch gekennzeichnet, daß der Datenbus (68) unter Zwischenschaltung eines Pufferspeichers (74) mit der Speichervorrichtung (42) sowie mit dem Linearisierungs-Chip (41) verbunden ist.
- Leseeinheit nach einem oder mehreren der Ansprüche 5 bis 7, dadurch gekennzeichnet, daß ein Adreßbus (69) des Rechnerbusses (66) unter Zwischenschaltung eines weiteren Pufferspeichers (73) mit dem Adreßport der Speichervorrichtung (46) verbunden ist.
- Leseeinheit nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Steuer- und/oder Auswertevorrichtung (44) durch einen Mikroprozessor (67) und durch eine Ablaufkontrollvorrichtung (75) gebildet ist.
- Leseeinheit nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Steuer- und/oder Auswertevorrichtung (44) zur Weiterleitung der gelesenen, korrigierten Bilddaten an einen übergeordneten Rechner (62) ausgebildet ist.
- Leseeinheit nach einem oder mehreren der Ansprüche 6 bis 12, dadurch gekennzeichnet, daß die Steuer- und/oder Auswertevorrichtung (44), der Zwischenspeicher (59) und die Ausgleichsvorrichtung (39) auf einer die Scannerelektronik (65) für die Leseeinheit (1) bildenden Printplatte angeordnet sind, die über vorbestimmte Schnittstellen mit der Scannervorrichtung (25) leitungsverbunden ist.
- Leseeinheit nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß eine Schnittstelle (61) zwischen der Steuer- und/oder Auswertevorrichtung (44) der Leseeinheit (1) und einem übergeordneten Rechner (62) durch eine Centronics-Parallelschnittstelle oder durch eine USB-Schnittstelle gebildet ist.
- Leseeinheit nach Anspruch 13, dadurch gekennzeichnet, daß die Scannervorrichtung (25) eine eigenständige, modulartige Baueinheit bildet, die über zumindest eine Leitungsverbindung, insbesondere über ein Kabel (118) mit der Scannerelektronik (65) leitungsverbunden ist.
- Leseeinheit nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Scannervorrichtung (25) als Scannerkopf (117) ausgebildet ist, welcher sich quer zur Zuführ- bzw. Transportrichtung (Pfeil (7)) des Dokumentes (2) über den Bereich der Abtastzone erstreckt.
- Leseeinheit nach Anspruch 16, dadurch gekennzeichnet, daß der Scannerkopf (117) einen Aufnahmerahmen (120) aufweist, welcher zumindest einen optoelektrischen Wandler (34), zumindest eine Lichtquelle (32, 33) und eine Linsenanordnung (35) haltert.
- Leseeinheit nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß zumindest zwei als Lichtleisten ausgebildete Lichtquellen (32, 33) angeordnet sind, die ihr Licht in Richtung auf eine abzutastende Flachseite (92, 93) des Dokumentes (2) abstrahlen.
- Leseeinheit nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der optoelektrische Wandler (34) mittels einer Vielzahl von optoelektrischen Elementen zur Umwandlung des von der jeweiligen Flachseite (92, 93) refraktierten Lichtes in das die Lichtverhältnisse am optoelektrischen Wandler (34) repräsentierende Bildsignal (37) ausgebildet ist.
- Leseeinheit nach Anspruch 17, dadurch gekennzeichnet, daß die Linsenanordnung (35) durch eine Vielzahl von Gradientenlinsen (36) gebildet ist, welche bezogen auf eine Vertikalrichtung zwischen der optisch abzutastenden Flachseite (92, 93) und dem als CCD-Element ausgebildeten optoelektrischen Wandler (34) angeordnet ist und das von einem Dokument (2) refraktierte Licht auf den einzelnen optoelektrischen Elementen desselben abbilden.
- Leseeinheit nach Anspruch 17 oder 18, dadurch gekennzeichnet, daß die bevorzugt als LED-Leisten ausgebildeten Lichtquellen (32, 33) bezogen auf die Zuführ- bzw. Transportrichtung (Pfeil (7)) vor und nach dem optoelektrischen Wandler (34) angeordnet sind, sodaß der optoelektrische Wandler (34) zwischen zumindest zwei solcher leistenartiger Lichtquellen (32, 33) angeordnet ist.
- Leseeinheit nach Anspruch 17, dadurch gekennzeichnet, daß die optischen, elektrischen und/oder optoelektrischen Komponenten der Scannervorrichtung (25) mittels einer transparenten Abdeckplatte (121) auf dem Aufnahmerahmen (120) staubdicht vom Umgebungsbereich abgeschlossen sind.
- Leseeinheit nach Anspruch 22, dadurch gekennzeichnet, daß die bevorzugt aus Glas gebildete, transparente Abdeckplatte (121) während dem Scannvorgang mit der abzutastenden Flachseite (92, 93) eines Dokumentes (2) kontaktiert ist.
- Leseeinheit nach Anspruch 22 oder 23, dadurch gekennzeichnet, daß eine Andrückvorrichtung (31), welche bevorzugt als drehbar gelagerte Walze ausgebildet ist, ein einzulesendes Dokument (2) lückenlos bzw. vollständig gegen eine Anlagefläche (30) der Abdeckplatte (121) drückt.
- Leseeinheit nach Anspruch 24, dadurch gekennzeichnet, daß eine Drehachse der als Andrückwalze ausgebildeten Andrückvorrichtung (31) und eine Mittelachse der Gradientenlinse (36) und/oder des optoelektrischen Wandlers (34) auf einer gemeinsamen Vertikalachse (122) liegen.
- Leseeinheit nach Anspruch 25, dadurch gekennzeichnet, daß die Drehachse der Andrückvorrichtung (31) parallel zur Längsmittelachse der aus einer Vielzahl von Linsen bestehenden Linsenanordnung (35) und/oder parallel zu einer Mittelachse (90) des als Zeilen-CCD ausgebildeten optoelektronischen Wandlers (34) verläuft.
- Leseeinheit nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Scannervorrichtung (25), insbesondere der Scannerkopf (117) über eine Lagervorrichtung (123) translatorisch und/oder rotatorisch in der Leseeinheit (1) gelagert ist.
- Leseeinheit nach einem Anspruch 27, dadurch gekennzeichnet, daß die Lagervorrichtung (123) eine Gelenks- und/oder Führungsvorrichtung (124) ausbildet, die die Scannervorrichtung (25) rotatorisch um eine parallel zu den Flachseiten (92, 93) des Dokumentes (2) verlaufende Schwenkachse (127) lagert.
- Leseeinheit nach Anspruch 16 oder 17, dadurch gekennzeichnet, daß der Scannerkopf (117) in einer Vertikalführung (129) senkrecht zur Schwenkachse (127) verstellbar gelagert ist.
- Leseeinheit nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Transportvorrichtung (17) eine Mehrzahl von elektromotorisch antreibbaren Antriebs- und/oder Transportrollen (18, 19) aufweist, die ein Dokument (2) entlang einer vorgesehenen Führungsbahn (6) innerhalb der Leseeinheit (1) führen und befördern.
- Leseeinheit nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß bezogen auf die Zuführ- bzw. Transportrichtung (Pfeil (7)) vor der Scannervorrichtung (25) eine Ausrichtvorrichtung (89) zur Herstellung einer einheitlichen Orientierung schiefwinkelig einlaufender Dokumente (2) angeordnet ist.
- Leseeinheit nach Anspruch 31, dadurch gekennzeichnet, daß die Ausrichtvorrichtung (89) eine Querfördervorrichtung (96) zur Querförderung der einzulesenden Dokumente (2) bis zu einer parallel zur üblichen Zuführ- bzw. Transportrichtung (Pfeil (7)) ausgerichteten Anschlagfläche (103) aufweist.
- Leseeinheit nach einem oder mehreren der Ansprüche 17, 18 oder 21, dadurch gekennzeichnet, daß die Lichtquellen (32, 33) zur Abstrahlung von weißem oder davon unterschiedlichem Licht, bevorzugt zur Abstrahlung von rotem Licht ausgebildet sind, um Darstellungen dementsprechender Farbe auf dem Dokument (2) auszublenden.
- Leseeinheit nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Steuer- und/oder Auswertevorrichtung (44) mit einer in der Leseeinheit (1) angeordneten Ausgabevorrichtung (105) leitungsverbunden ist.
- Leseeinheit nach Anspruch 34, dadurch gekennzeichnet, daß die Ausgabevorrichtung (105) zur dauerhaften Anbringung von Zeichen auf dem Dokument (2) ausgebildet ist und durch eine Druckereinheit (106) oder eine Stempeleinheit (107) gebildet ist.
- Leseeinheit nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß sie in einem Bank- und/oder Lotterieterminal eingesetzt ist und Detektionseinrichtungen (8, 26) und/oder Sperr- und/oder Freigabevorrichtungen (10), insbesondere Shutter (11) für Dokumente (2) aufweist.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0046698A AT408038B (de) | 1998-03-17 | 1998-03-17 | Leseeinheit für ein dokument |
AT46698 | 1998-03-17 | ||
PCT/AT1999/000065 WO1999048278A1 (de) | 1998-03-17 | 1999-03-16 | Leseeinheit für ein dokument |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1064779A1 EP1064779A1 (de) | 2001-01-03 |
EP1064779B1 true EP1064779B1 (de) | 2002-08-28 |
Family
ID=3491370
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99908665A Expired - Lifetime EP1064779B1 (de) | 1998-03-17 | 1999-03-16 | Leseeinheit für ein dokument |
Country Status (6)
Country | Link |
---|---|
US (1) | US7142334B1 (de) |
EP (1) | EP1064779B1 (de) |
AT (1) | AT408038B (de) |
AU (1) | AU2818399A (de) |
DE (1) | DE59902468D1 (de) |
WO (1) | WO1999048278A1 (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050185225A1 (en) * | 2003-12-12 | 2005-08-25 | Brawn Dennis E. | Methods and apparatus for imaging documents |
US20050157955A1 (en) * | 2004-01-15 | 2005-07-21 | Hitachi Global Storage Technologies | Self-contained OCR system using hard disk drive |
KR20060055940A (ko) * | 2004-11-19 | 2006-05-24 | 삼성전자주식회사 | 메모리를 포함하는 ccd 및 이를 포함하는 화상입력장치 및 화상입력방법 |
TW200641564A (en) * | 2005-02-24 | 2006-12-01 | Fuji Photo Film Co Ltd | The correction method of plotting device |
JP4533239B2 (ja) * | 2005-05-24 | 2010-09-01 | キヤノン株式会社 | 画像読取装置および画像形成装置 |
JP2010253770A (ja) * | 2009-04-23 | 2010-11-11 | Ihi Corp | オフセット印刷方法及び装置 |
US8556179B2 (en) * | 2011-08-16 | 2013-10-15 | Intermec Ip Corp. | Motion tolerant bar code reader |
US8564851B2 (en) * | 2011-10-25 | 2013-10-22 | Honeywell Asca Inc. | Scanner belt load and stretch compensation control system |
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US4295167A (en) * | 1979-10-12 | 1981-10-13 | Xerox Corporation | Carriage speed control for a raster scanner |
US4491961A (en) * | 1982-02-12 | 1985-01-01 | Burroughs Corporation | Pixel correction logic circuit |
JPS611167A (ja) | 1984-06-14 | 1986-01-07 | Matsushita Graphic Commun Syst Inc | 原稿読取装置 |
JPS61166266A (ja) | 1984-12-26 | 1986-07-26 | Fujitsu Ltd | 光学読取装置 |
IL78675A (en) * | 1986-05-02 | 1993-02-21 | Scitex Corp Ltd | Color separation scanner |
JPS63136293A (ja) | 1986-11-28 | 1988-06-08 | Oki Electric Ind Co Ltd | バ−コ−ド化方法 |
US5103485A (en) * | 1988-03-29 | 1992-04-07 | Canon Kabushiki Kaisha | Pattern information reading apparatus |
US5101448A (en) * | 1988-08-24 | 1992-03-31 | Hitachi, Ltd. | Method and apparatus for processing a document by utilizing an image |
JPH02189073A (ja) | 1989-01-17 | 1990-07-25 | Fuji Xerox Co Ltd | 画像読取装置の画像データ調整方式 |
US5191442A (en) * | 1990-04-26 | 1993-03-02 | Ecrm | Apparatus for scanning a document |
US5392135A (en) * | 1990-10-05 | 1995-02-21 | Canon Kabushiki Kaisha | Image reading apparatus having different reading speeds |
JPH057296A (ja) | 1991-06-26 | 1993-01-14 | Sony Corp | フイルム読み取り装置 |
JP3133147B2 (ja) * | 1992-05-27 | 2001-02-05 | ローム株式会社 | イメージセンサ |
JPH06253209A (ja) | 1993-02-24 | 1994-09-09 | Nikon Corp | 画像読み取り装置 |
EP0658503B1 (de) | 1993-12-17 | 2001-04-04 | Canon Kabushiki Kaisha | Blatttransportgerät |
DE69533812T2 (de) * | 1994-05-24 | 2005-12-15 | Pfu Ltd. | Bildabtaster mit Bildkorrekturfunktion |
US5442465A (en) | 1994-08-31 | 1995-08-15 | Eastman Kodak Company | Apparatus and method for controlling a linear imaging device |
JP2733646B2 (ja) * | 1994-10-20 | 1998-03-30 | 日本アイ・ビー・エム株式会社 | カード発行装置及びその制御方法 |
FR2727816A1 (fr) | 1994-12-02 | 1996-06-07 | Fast France Adv Sys Tech Sarl | Scanner de tout type de document et procede de mise en oeuvre dudit scanner |
US5729361A (en) * | 1995-06-30 | 1998-03-17 | Logitech, Inc. | Color scanner using both variable led exposure time and photo detector output compensation |
US6166832A (en) * | 1995-12-26 | 2000-12-26 | Rohm Co., Ltd. | Contact-type image sensor |
US6496285B1 (en) * | 1998-02-25 | 2002-12-17 | Rohm Co., Ltd. | Image reading apparatus |
US6441928B1 (en) * | 2000-01-03 | 2002-08-27 | Docuport, Inc. | Apparatus and method for reading a document using a waveguide formed in a substrate |
-
1998
- 1998-03-17 AT AT0046698A patent/AT408038B/de not_active IP Right Cessation
-
1999
- 1999-03-16 EP EP99908665A patent/EP1064779B1/de not_active Expired - Lifetime
- 1999-03-16 DE DE59902468T patent/DE59902468D1/de not_active Expired - Lifetime
- 1999-03-16 AU AU28183/99A patent/AU2818399A/en not_active Abandoned
- 1999-03-16 US US09/646,284 patent/US7142334B1/en not_active Expired - Fee Related
- 1999-03-16 WO PCT/AT1999/000065 patent/WO1999048278A1/de active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
EP1064779A1 (de) | 2001-01-03 |
US7142334B1 (en) | 2006-11-28 |
WO1999048278A1 (de) | 1999-09-23 |
AT408038B (de) | 2001-08-27 |
DE59902468D1 (de) | 2002-10-02 |
ATA46698A (de) | 2000-12-15 |
AU2818399A (en) | 1999-10-11 |
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